Disc apparatus

Abstract

A disc apparatus including: a disc tray on which a disc is mounted; an optical pickup unit which irradiates a light beam on the disc; a traverse assembly unit on which the optical pickup unit is mounted; a driving motor which is a power source for operating the disc tray, the optical pickup unit, and the traverse assembly unit; an inner circumference arrival sensor which detects whether the optical pickup unit arrives at the inner circumference of the disc; and an encoder sensor which detects the number of rotations of the driving motor when the driving motor rotates clockwise or counterclockwise, wherein based on the number of rotations of the driving motor in the clockwise direction, the optical pickup unit is moved to the inner circumference of the disc, and then the traverse assembly unit descends, so that the disc tray is opened.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a disc apparatus for, for example, a CD and a DVD. [0003] 2. Description of the Related Art [0004] In a commonly used disc apparatus (for example, see JP-A-2002-100099, JP-A-6-119698, JP-A-6-338119 and JP-A-2001-216702), a disc tray (tray) is opened or closed (unloading / loading) at a slit-shaped entrance which is provided in a front panel of an exterior housing by driving force of a driving motor. [0005] Generally, the disc apparatus includes a switch (tray open switch) for detecting whether the tray is opened completely, in order to stop the operation of the driving motor for driving the disc tray, when the disc tray is opened (when the opening of the tray is completed). [0006] In addition, there can be different types of disc apparatuses, such as a disc apparatus in which a stopper or the like is provided in the vicinity of a slit-shaped entrance and in which the operation of the d...

AI Technical Summary

Benefits of technology

[0010] The present invention has been made to solve the above problems. An object of the invention is to provide a disc apparatus in which a tray open switch which detects whether a disc tray is opened completely is not provided, thereby improving the flexibility of the design, and thus the manufacturing costs of the disc apparatus can be decreased, and a high-quality moving operation of the disc tray can be guaranteed.

[0012] According to the above-mentioned structure, since ‘the optical pickup unit’, ‘the traverse assembly unit’, and ‘the disc tray’ can be operated based on the encoder control, the respective members can be operated in an extremely smooth manner. In addition, since it is possible to know the location of the disc tray when the disc tray is completely opened by the encoder control, a tray open switch is not required. As a result, the flexibility of the design can be improved, and the manufacturing costs of the disc apparatus can be decreased. In addition, a high-quality moving operation of the disc tray can be guaranteed.

Problems solved by technology

That is, since the tray open switch is provided in a limited space inside the disc apparatus, which causes the flexibility of the design to be lowered.

In addition, the provision of the tray open switch increases the number of components which constitute the disc apparatus, resulting in an increase in the manufacturing costs of the disc apparatus.

Therefore, the disc tray does not stop smoothly, and thus a high-quality operation cannot be performed.

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